refactor: remove intermediate variable

Co-authored-by: MGatner <mgatner@icloud.com>

system/Helpers/date_helper.php

@@ -27,9 +27,7 @@ function now(?string $timezone = null): int
         $timezone = empty($timezone) ? app_timezone() : $timezone;
 
         if ($timezone === 'local' || $timezone === date_default_timezone_get()) {
-            $time = Time::now();
-
-            return $time->getTimestamp();
+            return Time::now()->getTimestamp();
         }
 
         $time = Time::now($timezone);